fixed broken --dfb:help output. vt-switch was not mentioned, others had wrong descriptions.
fixed broken --dfb:help output. vt-switch was not mentioned, others had wrong descriptions.

deniskropp/DirectFB,DirectFB/directfb,lancebaiyouview/DirectFB,lancebaiyouview/DirectFB,mtsekm/test,kaostao/directfb,djbclark/directfb-core-DirectFB,dfbdok/DirectFB1,djbclark/directfb-core-DirectFB,Distrotech/DirectFB,lancebaiyouview/DirectFB,kevleyski/DirectFB-1,jcdubois/DirectFB,dfbdok/DirectFB1,kevleyski/directfb,jcdubois/DirectFB,kevleyski/DirectFB-1,kevleyski/directfb,mtsekm/test,sklnet/DirectFB,kevleyski/directfb,kaostao/directfb,jcdubois/DirectFB,Distrotech/DirectFB,DirectFB/directfb,kaostao/directfb,DirectFB/directfb,deniskropp/DirectFB,sklnet/DirectFB,lancebaiyouview/DirectFB,sklnet/DirectFB,sklnet/DirectFB,djbclark/directfb-core-DirectFB,Distrotech/DirectFB,kevleyski/directfb,deniskropp/DirectFB,djbclark/directfb-core-DirectFB,deniskropp/DirectFB,dfbdok/DirectFB1,mtsekm/test,kevleyski/DirectFB-1,kevleyski/DirectFB-1